How to tell the difference between a Flags enum and ordinary enum? [duplicate]

Question

This question already has answers here:

Finding out if an enum has the "Flags" attribute set (3 answers)

Closed 9 years ago.

Is there any way to test reflectively if an enum is a [Flags] enum or if it's a regular enum?

I need the application to behave slightly differently if the enum is a Flags enum than if it's not a Flags enum.

Answer 1

You can test for attribute existence via reflection:

System.Attribute[] attrs = System.Attribute.GetCustomAttributes(t);
var isFlags = attrs.Any(attr => attr is FlagsAttribute);

Or:

var isFlags = typeof(MyEnum).GetCustomAttributes<FlagsAttribute>().Any();

See: http://msdn.microsoft.com/en-us/library/z919e8tw(v=vs.80).aspx

[OP Edit:]

this worked, but the syntax is slightly wrong. This is correct:

var isFlags = myEnum.GetType()
    .GetCustomAttributes(typeof(FlagsAttribute), false).Any();

Answer 2

You can get the attributes of the enum with reflection and see if the FlagsAttribute is used.